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Appendix B
Comparison of System Program Functions
A PT with the DeviceNet Interface Unit installed will operate with the functions of a “-V1” version (system program
version 2.1) of the PT regardless of the PT’s actual version. The functions that can actually be used in newer PTs
will differ from the functions described in the PT’s manual when the DeviceNet Interface Unit’s system program is
installed. Moreover, the manuals for the “-V1” PT versions describe the functions of system program version 2.0,
so they do not cover the new functions added to system program version 2.1.
This appendix describes only the differences between the functions which can be used with version 2.1 and the
contents of the manuals for the “-V1” and “-V2” PTs, so this appendix can be used as reference when creating
screen data for the DeviceNet Interface Unit. Only the differences due to the system program version are de-
scribed here. Refer to 1-5 Functions of the DeviceNet Interface Unit for details on functional differences due to the
DeviceNet Interface Unit’s specifications.
Differences from System Program Version 2.0
The following table shows the differences between system program version 2.0 (described in the manuals for the
“-V1” PTs) and system program version 2.1 (used with the DeviceNet Interface Unit).
Item
Ver. 2.0
Ver. 2.1 (used with the DeviceNet
Interface Unit)
Indirect reference of images and libraries
Indirect referencing not supported
Indirect referencing supported
Number of fixed display elements that can
be registered in the library
64 max.
65,535 max.
Max. number of message characters that
can be displayed in the alarm list/history of
an NT631/NT631C PT
40 characters max.
(The actual number may be lower
depending on the display method.)
40 characters max.
(The max. is always 40 characters
regardless of the display method.)
